The invention discloses a control system for a bridge gap residue clearing device. The control system for the bridge gap residue clearing device is used for clearing the residue in the gap of the bridge (as bridge expansion gap). The control system for the bridge gap residue clearing device comprises a DSP controller, a motor driving circuit and a bridge gap residue clearing device; the bridge gap residue clearing device comprises a support plate, the support plate is used for stretching over the gap and fixedly connected with a lower end of a bracket vertically arranged, an upper end of the bracket is fixedly connected with a driving motor, the DSP controller is connected with a driving motor in the bridge gap residue clearing device through the motor driving circuit for controlling the driving motor for rotating, the driving motor is connected with a driving sleeve in a power mode for driving the driving sleeve for rotating, an outer surface of the driving sleeve is connected with an upper part of an inner hole of a sliding sleeve (7) in a sliding mode in a key matching mode.